just to clarify, this is how the timeline goes in my head--

they rode into septoh
they went to the museum the next day and had the fight
one day of rest to recover from the incidents before
next day they went back to septoh

so i only timeskipped a day technically.

also, lol, you did reveal what was in the pokeball? it was an exeggcute? dan's mom said it outloud? xD